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Ken Griffin

Ken Griffin

Occupation: hedge fund manager

Birthday: October 15, 1968

Age: 53

Birthplace: Daytona Beach, Florida

Nationality: United States

Birth Sign: Libra


Kenneth Griffin is the founder, chief executive officer, co-chief investment officer, and 85% owner of Citadel LLC, a global hedge fund and the largest market maker in the U.S.

Griffin has contributed tens of millions of dollars to Republican candidates.. He has also generously donated to a number of charitable causes, in the fields of education and the arts. His art collection is valued at $800 million and his homes are valued at another $1 billion.

Ken Griffin Early life

Griffin was born in 1968 in Daytona Beach, Florida, the son of a building supplies executive. When he was in high school, Ken Griffin ran a discount mail-order education software firm out of his bedroom called EDCOM. 

At Harvard College, one of his first investments was to buy put options on Home Shopping Network, which made him a nice $5,000 profit. He also liked investing in convertible arbitrage opportunities in convertible bonds. Despite a ban on running businesses from campus, Griffin convinced school admins to allow him to install a satellite dish on the roof of his dorm building to receive stock quote updates. His first fund launched in 1987 with $265,000, just days after his 19th birthday. The fund launched in time to profit from short positions on Black Monday. Griffin eventually graduated in 1989 with a degree in economics.ken griffin harvard

Ken Griffin Career

Glenwood Capital Investments

After graduating in 1989, Griffin moved to Chicago to work for Glenwood Capital Investments. The company gave Griffin $1 million of capital of which Griffin made 70% of in a year.

Citadel LLC

Citadel LLC 1990

A year later, in 1990, Griffin founded Citadel LLC, with $4.6 million under management of $4.6 million. His fund made 43% in 1991 and 40% in 1992.

Citadel Securities


In the early 2000s, Griffin founded market maker called Citadel Securities. By 2003, at the age of  34, Griffin was the youngest self-made individual on the Forbes 400 with an estimated net worth of $650 million.

Aragon Global Management

Between 2003 and 2009, Griffin was the lead investor in Aragon Global Management, a hedge fund run by his then-wife Anne Dias-Griffin.

Anne Dias-Griffin and Ken

In 2006, Citadel acquired positions of Amaranth Advisors at a steep discount.

During 2008 financial crisis, Griffin barred his investors from withdrawing money, which garnered much cr criticism. At the peak of the crisis, the firm was losing “hundreds of millions of dollars each week” since it was leveraged 7:1. The biggest Citadel funds finished 2008 down 55%. However, they rebounded with a 62% return in 2009.

Citadel LLC

In 2020, Griffin’s net worth surpassed $20 billion due to Citadel’s growing market valuation. Citadel Securities,  increased its profit to $2.36 billion during the first half of 2020 thanks to a hug spike in market volatility.

citadel returns

In 2021, Griffin attracted criticism online for the role played by Citadel in the GameStop short squeeze where it was announced thatCitadel would invest $2 billion into Melvin Capital, which had suffered losses of more than 30% on account of its short positions, particularly on GameStop.

ken griffin consitution

In late 2021, Griffin got his revenge when he outbid the ConsitutionDAO for rights to a copy of the U.S. Constitution actioned off by Sotheby’s.

Ken Griffin’s Net Worth: $21 Billion

Griffin has a net worth of $21 billion, making him the second richest person in the state of Illinois and the 45th richest person in the United States.

Ken Griffin Favorite Books

Ken Griffin is all in on mastering finance/economics/psychology with his favorite books including Fooled By Randomness, Thinking Fast and Slow, Snowball and Liar’s Poker.

Ken Griffin homes

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